Kate Middleton presents Lord Sebastian Coe with the Lifetime Achievement Award during the BBC Sports Personality of the Year Awards 2012 (Landov)

Prince William & Kate Middleton (FameFlynet)

Shakira (SplashNews)

Jessica Simpson & Eric Johnson (SplashNews)

Wiz Khalifa & Amber Rose (FameFlynet)

Kristen Bell (FameFlynet)

Claire Danes (FameFlynet)

Holly Madison (FameFlynet)

Busy Phillips (FameFlynet)

Guy Ritchie & Jacqui Ainsley (FameFlynet)

Kerri Walsh (FameFlynet)

Jason & Molly Mesnick (Getty)

Leah Messer (MTV)

Tori Spelling (FameFlynet)

Reese Witherspoon (FameFlynet)

Kate Middleton (FameFlynet)

Holly Madison (FameFlynet)

Beyonce Knowles (FameFlynet)

Mariah Carey (SplashNews)

Gwyneth Paltrow (SplashNews)

Ali Landry (FameFlynet)

For many celebrities, 2012 was one fertile year — and these mommies-to-be had some of the most shocking pregnancy announcements! Check out our roundup of 2012’s most shocking pregnancies.

Even celebrities can surprise us sometimes, especially when it comes to announcing the good news that they are expecting a baby. Jessica Simpson’s shocking second pregnancy came just months after welcoming daughter Maxwell Drew Johnson — and losing more than 60 pounds of baby weight!

And even though all eyes have been on Kate Middleton to start showing a baby bump basically since she got married in April 2011, she and husband Prince William stunned the world on Dec. 3 when they announced they were officially expecting their first child. But the circumstances were less than ideal — the announcement came prematurely as Kate was in the hospital being treated for severe morning sickness.

But one of the most shocking pregnancy announcements came from Olympic gold medalist Kerri Walsh Jennings, who revealed she was pregnant during the 2012 London Olympics while she was competing in sand volleyball.

“When I was throwing my body around fearlessly and going for gold for our country, I was pregnant,” she told Matt Lauer on the Today show on Sept. 24.

2012 was already a big year for celeb babies, but it looks like 2013 will bring another huge batch of A-list tots — and we can’t wait to meet them next year!